Quality control in cone-beam computed tomography (CBCT) EFOMP-ESTRO-IAEA protocol (summary report)

Hugo de las Heras Gala, Alberto Torresin, Alexandru Dasu, Osvaldo Rampado, Harry Delis, Irene Hernández Girón, Chrysoula Theodorakou, Jonas Andersson, John Holroyd, Mats Nilsson, Sue Edyvean, Vesna Gershan, Lama Hadid-Beurrier, Christopher Hoog, Gregory Delpon, Ismael Sancho Kolster, Primož Peterlin, Julia Garayoa Roca, Paola Caprile, Costas Zervides

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The aim of the guideline presented in this article is to unify the test parameters for image quality evaluation and radiation output in all types of cone-beam computed tomography (CBCT) systems. The applications of CBCT spread over dental and interventional radiology, guided surgery and radiotherapy. The chosen tests provide the means to objectively evaluate the performance and monitor the constancy of the imaging chain. Experience from all involved associations has been collected to achieve a consensus that is rigorous and helpful for the practice. The guideline recommends to assess image quality in terms of uniformity, geometrical precision, voxel density values (or Hounsfield units where available), noise, low contrast resolution and spatial resolution measurements. These tests usually require the use of a phantom and evaluation software. Radiation output can be determined with a kerma-area product meter attached to the tube case. Alternatively, a solid state dosimeter attached to the flat panel and a simple geometric relationship can be used to calculate the dose to the isocentre. Summary tables including action levels and recommended frequencies for each test, as well as relevant references, are provided. If the radiation output or image quality deviates from expected values, or exceeds documented action levels for a given system, a more in depth system analysis (using conventional tests) and corrective maintenance work may be required.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalPhysica Medica
Volume39
DOIs
Publication statusPublished - 1 Jul 2017

Keywords

  • Cone-beam CT
  • Diagnostic radiology
  • Ionizing radiation
  • Quality control
  • Radiation protection

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    de las Heras Gala, H., Torresin, A., Dasu, A., Rampado, O., Delis, H., Hernández Girón, I., Theodorakou, C., Andersson, J., Holroyd, J., Nilsson, M., Edyvean, S., Gershan, V., Hadid-Beurrier, L., Hoog, C., Delpon, G., Sancho Kolster, I., Peterlin, P., Garayoa Roca, J., Caprile, P., & Zervides, C. (2017). Quality control in cone-beam computed tomography (CBCT) EFOMP-ESTRO-IAEA protocol (summary report). Physica Medica, 39, 67-72. https://doi.org/10.1016/j.ejmp.2017.05.069